| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org,Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>,PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: PostgreSQL 12, JIT defaults |
| Date: | 2018-10-08 15:10:45 |
| Message-ID: | 9351D2C1-D5C1-49F2-A862-A2654A65E85B@anarazel.de |
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| Lists: | pgsql-hackers |
On October 8, 2018 8:03:56 AM PDT, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>Andres Freund <andres(at)anarazel(dot)de> writes:
>> Where is the jit=on coming from? Config from before it was turned
>off?
>
>A look in guc.c shows that jit defaults to "on" whether or not JIT is
>enabled at compile time.
I thought Pavel was talking about 11 somehow...
> This seems, at best, rather user-unfriendly.
>And it's not like our conventions for other compile-option-affected
>GUCs, eg the SSL ones.
That was intentional, even though it perhaps should be better documented. That allows a distro to build and distribute pg without llvm enabled, but then have the JIT package with all the dependencies separately. The pg yum packages do so.
Andres
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